/*
 * Copyright 2023 NAVER Corp.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 *
 */

package com.navercorp.pinpoint.web.applicationmap.map.processor;

import com.navercorp.pinpoint.common.timeseries.window.TimeWindow;
import com.navercorp.pinpoint.web.applicationmap.link.LinkDirection;
import com.navercorp.pinpoint.web.applicationmap.rawdata.LinkData;
import com.navercorp.pinpoint.web.applicationmap.rawdata.LinkDataMap;
import com.navercorp.pinpoint.web.vo.Application;
import org.apache.logging.log4j.LogManager;
import org.apache.logging.log4j.Logger;

/**
 * Filters out link data pointing to terminal and unknown nodes.
 *
 * @author HyunGil Jeong
 */
public class WasOnlyProcessor implements LinkDataMapProcessor {

    private final Logger logger = LogManager.getLogger(this.getClass());

    @Override
    public LinkDataMap processLinkDataMap(LinkDirection linkDirection, LinkDataMap linkDataMap, TimeWindow timeWindow) {
        final LinkDataMap filteredLinkDataMap = new LinkDataMap();
        for (LinkData linkData : linkDataMap.getLinkDataList()) {
            if (accept(linkData)) {
                filteredLinkDataMap.addLinkData(linkData);
            }
        }
        return filteredLinkDataMap;
    }

    private boolean accept(LinkData linkData) {
        final Application toApplication = linkData.getToApplication();
        boolean isDestinationTerminal = toApplication.getServiceType().isTerminal();
        boolean isDestinationUnknown = toApplication.getServiceType().isUnknown();
        if (isDestinationTerminal || isDestinationUnknown) {
            logger.debug("Filtering linkData : {}", linkData);
            return false;
        }
        return true;
    }
}
